1 files changed, 68 insertions, 0 deletions
diff --git a/src/lib/protocols/telegram.c b/src/lib/protocols/telegram.c
new file mode 100644
index 000000000..ba9397a92
--- /dev/null
+++ b/src/lib/protocols/telegram.c
@@ -0,0 +1,68 @@
+/*
+ * telegram.c
+ *
+ * Copyright (C) 2014 by Gianluca Costa xplico.org
+ * Copyright (C) 2012-15 - ntop.org
+ *
+ * This file is part of nDPI, an open source deep packet inspection
+ * library based on the OpenDPI and PACE technology by ipoque GmbH
+ *
+ * nDPI is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * nDPI is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with nDPI.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+
+#include "ndpi_protocols.h"
+
+#ifdef NDPI_PROTOCOL_TELEGRAM
+
+static void ndpi_int_telegram_add_connection(struct ndpi_detection_module_struct
+                                             *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+  ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_TELEGRAM, NDPI_REAL_PROTOCOL);
+  NDPI_LOG(NDPI_PROTOCOL_TELEGRAM, ndpi_struct, NDPI_LOG_TRACE, "TELEGRAM Found.\n");
+}
+
+
+void ndpi_search_telegram(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+  struct ndpi_packet_struct *packet = &flow->packet;
+  u_int16_t dport /* , sport */;
+  
+  NDPI_LOG(NDPI_PROTOCOL_TELEGRAM, ndpi_struct, NDPI_LOG_TRACE, "TELEGRAM detection...\n");
+
+  if (packet->payload_packet_len == 0)
+    return;
+  if (packet->tcp != NULL) {
+    if (packet->payload_packet_len > 56) {
+      dport = ntohs(packet->tcp->dest);
+      /* sport = ntohs(packet->tcp->source); */
+
+      if (packet->payload[0] == 0xef && (
+          dport == 443 || dport == 80 || dport == 25
+        )) {
+        if (packet->payload[1] == 0x7f) {
+          ndpi_int_telegram_add_connection(ndpi_struct, flow);
+        }
+        else if (packet->payload[1]*4 <= packet->payload_packet_len - 1) {
+          ndpi_int_telegram_add_connection(ndpi_struct, flow);
+        }
+        return;
+      }
+    }
+  }
+
+  NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_TELEGRAM);
+}
+#endif